Wood-cutting machine



- 2 Sheets-Sheet 2. W. P; CAMPBELL.-

v Woode0u'tting Machine. No 227,955. Patented May 25 I880.

A J n n n Cm @73 V WW N. FEI'ERS, PHOTO-LITHDGRAPNER, WASHINGTON, D. C)

UNITED STATES.

* A'IENT rrrcn.

WOOD-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 227,955, dated May 25,1880.

Application filed February 16, 1880.

To all whom it may concern Be itknown that 1, WILLIAM P. CAMPBELL, ofHastings, in the county of Barry and State of Michigan, have invented anImprovement in food-Cutting Machines, of which the following is aspecification.

The nature of my invention relates to certain new and usefulimprovements in the construction of machines designed for cutting boltsof wood into veneers or shingles, as may be desired; and the inventionconsists in the peculiar construction of a horizontally'reciproeatinggate carrying a cutter-knife,in the construction of a device forautomatically tilting the table, and in the peculiar construction andarrangement of the various parts, all as more fully hereinafter setforth.

In the drawings, Figure l is a longitudinal central vertical section.Fig. 2 is a top plan. Fig. 3 is a transverse section. Fig. 4: is abottom perspective of the reciprocating gate. Fig. 5 is a plan view withthe tables and gate removed. Fig. 6 is a detached perspective of thespring tilting-lever.

In the accompanying drawings, which form a part of this specification, Arepresents a suit able frame, preferably secured together by means ofbolts, as shown. Journaled in proper bearings across one end of thisframeAis the shaft B, driven by means of a belt upon the pulley 0. Uponthis shaft is keyed a fly-wheel, D, to which one end of the pitman E isconnected for imparting a reciprocating motion to the knife-gate, ashereinafter described.

F are guide-rails, rigidly secured horizontally to the inner faces ofthe sides of the frame.

G represents a gate, connected at its rear end with the pitman E. Thisgate is provided with two or more adjust-able slides, H, upon each side,which slide upon the rails F and guide the gate in its reciprocatingmovement. These slides are made adjustable by any suitable means, sothat they can readily be adjusted to take up and compensate for the lostmotion caused by the wear of the parts. At the front end of this gate isremovably secured the cutting-knife I, and upon each side of the gate,projecting inwardly below the knife, are secured the stationary tablesJ.

K is a tilting table, properly secured upon a rock-shaft, L, which isjournaled in proper in contact with the spring-lever Q, and in its vforward movement over one of the cam side faces, 0, of the enlarged partof said lever forces the armo to slide to one side of. the yoke S, whereit is retained by the spring b, the pointed outer end of the lever Qswinging to the opposite side. In the return motion of the gate the armI? springs by the pointed end of the spring-lever, so that in the returnmotion the arm P passes upon the opposite side of the spring-lever,causing a directly opposite movement of the parts, and tilting the tableat each stroke in alternate directions, so that in cutting shinglesalternate tips and butts will be out.

The spring-lever Q rests upon a rubber cushion, d, recessedin the frameR, and through which the pivotal bolt of the lever passes. This rubbercushion is for the purpose of allowing the spring-lever to move or givelaterally under the action of the arm P. The spring end of the lever,bearing against such arm during the cutting stroke, retains the.table Kin its tilted position.

To regulate the degree of tilt or inclination of the table, or to adjustthe same to a perfectly horizontal position in a plane with thestationary tables J, I tap through the girts M N proper adjListing-bolts c, the upper ends of which come in contact with the lowerface of the table, and by means of which such table is adjusted as maybe desired.

An endless carrier, T, is arranged at one end of the frame below thereciprocating knifegate, upon which will fall the material cut from thebolt, and which will deliver it at the end of the machine.

Upon the top of the frame I secure a table, U, upon which to place boltsto be cut up into shingles or veneers. In advance of this table issecured a resistance block or bar, V,-

adjustable by means of bolts h and curved or enlarged slots h, whichpass through the bar into the frame below at each end, so as to en-.able the block to be adjusted so as to present the block at a greater orlesser angle to the cutting-knife.

Upon each side of the frame, above the gate, are cheek-pieces W,provided with slots a, for the reception of set-screws m, passingthrough said slots into the frame, whereby the cheekpieces areadjustable laterally and longitudinally to correspond to the position ofthe re sistance-bar. 1

The tilting table K and the stationary or fixed tables J are providedwith longitudinal -metal strips is, upon which the bolt Z rests whilebeing operated upon by the knife.

It will be perceived that by means of the curved or enlarged slots hnear the ends of the resistance-bar V, in conjunction with the bolts It,said bar may be adjusted back and forth in parallel lines, or the angleof the resistance-bar to the knife may be varied as desired fordifferent kinds of wood, by the iongitudinal adjustments of one of thecheekpieces W and the radial adjustment of one end of the resistancebarby means of the bolt h and curved slot h in said end. This adjustmentwill change the angle of the resistancebar to the knife I, and may oftenbe employed advantageously for different kinds of wood and in reducingthe shock on the parts of the machine when the knife-edge enters thebolt more gradually, and the resistance-bar may also be so adjusted thatthe line of direction of the cut may be more nearly in the direc-' tionof the line of the fibers of the bolt than when the bolt to be cut istransversely arranged on the table. As the cheek-pieces W preventlateral movement of the bolt and abut against the resistance-bar, theymust necessarily be adjusted before the resistance-bar is adjusted.

It will also be observed that after the table has been tilted itsinclination during the out is retained by the bolt resting on said tableholding the latter in an inclined position by the knife engaged in thebolt, the resistanceblock and the cheek-pieces W confining it laterally.The mechanism for tilting the table also is so arranged that after thetable has been tilted the spring-lever Q is positively held in itstilted position by the spring I) holding the arm a of the spring-lever Qin arecess in the yoke S until the cut is made, and the arm a isretained in such position with the table tilted until the next forwardreciprocation of the gate, when the table is tilted in the oppositedirection. The outer end of the lever Q is elastic or a spring, and inthe forward movement of the gate the arm 1? forces the spring-lever Qaside and its arm a into one of the recesses of the yoke, when said armrides over the cam 0 of the spring-leverQ, and the arm a is held in therecess in the yoke S by the spring I), and the table held in its tiltedposition until the next forward reciprocation of the gate, the arm P inthe backward reciprocation of the gate forcing back the elastic end ofthe spring-lever Q without swin gin gsaid spring-lever.

H eretofore a tilting table has been arranged upon the frame of awood-cutting machine; but in such construction some means have to beprovided for removing the shingle or piece of wood after it has beencut; but in my construction, in which the tilting table is arranged on areciprocating gate, the shingle or veneer, after having been cut fromthe block, falls from the machine through the space under the knife on'the conveyer T.

I am aware that a horizontal reciprocating gate carrying a cutter and atable on which the bolt to be cut rests, which table is automaticallytilted in the reciprocations of the gate by means of an arm attached tothe under side of the table operating against a lever, has heretoforebeen employed, and I thbrefore lay no claim to such invention, broadly.

What I claim as my'invention is 1. In a wood-cutting machine, thecombination, with the frame A, of the adjustable resistance-bar V,having end slots, h, and setscrews h, and the adjustable cheek-pieces W,provided with slots at and set-screws m, whereby the angle formed by thecutter and resistance-bar may be varied as desired, substantially asdescribed.

2. The reciprocating knife-gate G, carrying the tilting table K, havingthe hanger O, with arm P attached thereto, in combination withspring-lever Q, having side cam-faces, 0, and arm a, yoke S, havingrecesses or no, and spring I), the whole constructed and arranged tooperate in the manner and for the purpose set forth.

3. The combination, with the reciprocating knife-gate Gr, carrying thecutter I, and tilting table K, having the hanger O, with arm P securedthereto, of the spring-lever Q, pivotally secured in rubber cl andhaving side camfaces, 0, and arm a, recessed yoke S, and spring I), allconstructed and arranged to operate in the manner and for the purposeset forth.

4. The combination, with the adjustable resistance-block V, of thereciprocating gate G, carrying the automatic tilting table K and cutterI, substantially as described, and for WILLIAM P. CAMPBELL.

Witnesses:

JOHN R. EASTMAN, DANIEL HASKIN.

